The Roman numerals system was an ancient and popular form of writing numbers.

Roman numerals

The Roman numerals system was an ancient and popular form of writing numbers. today it is used in clocks to indicate time. All Roman numerals are written by 7 basic symbols.

Numbers in the roman system are written by combinations of letters from the Latin alphabet. Roman system used a different system and have not any place value. they had different rules for writing numbers using seven letters and they had no numeral for 0.

Roman Numeral	I	V	X	L	C	D	M
Value	1	5	10	50	100	500	1000

How do you write Roman numbers?

Rule 1

I (1), X (10), C (100), and M (1000) are special numeral, only they can be placed together and they can be subtracted. I, X, C, and M can be repeated up to three-time and the value of the repeated numerals gets added. 

Example :

     II   =  1 + 1 = 2    

     III  = 1 + 1 + 1  =  3,   

XXX   = 10 + 10 +10  =  30,  

CCC    = 100 + 100 + 100 = 300, 

MMM  = 1000  + 1000  + 1000  =  3000.


Rule 2 :

The smaller numeral gets added to the greater numbers on the left side.

Example -  

  VI  =  5 + 1 = 6,   

 VII  =  5 + 1 + 1 = 7,  

VIII =  5 + 1 + 1 + 1 =  8,   

  XII   = 10 + 1 + 1 = 12,   

XXXI = 10 + 10 + 10 + 1 = 31,  

     LX  = 50  + 10 = 60.


Rule 3 :

The smaller numeral gets subtracted from the greater numeral on its right side.                   

Example -

IX  = 10  - 1 = 9,   

XL =  50 - 10  = 40,  

XC = 100  - 10  =  90.


Rule 4

A smaller numeral between 2 greater numerals gets substrates from the numeral on its right side.                                                                                                                                           

 Example - XXIV  = 10 + 10 +  5 - 1 = 24.

90 is XC correct, LXXXX wrong because repeated up to three-time


The symbols V, L, and D are not repeated


10 is written as X, not VV

List of Roman numerals 1 to 100:

Roman Numerals 1 to 10

1	2	3	4	5	6	7	8	9	10
I	II	III	IV	V	VI	VII	VIII	IX	X

Roman Numerals 11 to 20

11	12	13	14	15	16	17	18	19	20
XI	XII	XIII	XIV	XV	XVI	XVII	XVIII	XIX	XX

Roman Numerals 21 to 30

21	22	23	24	25	26	27	28	29	30
XXI	XXII	XXIII	XXIV	XXV	XXVI	XXVII	XXVIII	XXIX	XXX

Roman Numerals  31 to 40

31	32	33	34	35	36	37	38	39	40
XXXI	XXXII	XXXIII	XXXIV	XXXV	XXXVI	XXXVII	XXXVIII	XXXIX	XL

Roman Numerals  41 to 50

41	42	43	44	45	46	47	48	49	50
XLI	XLII	XLIII	XLIV	XLV	XLVI	XLVII	XLVIII	XLIX	L

Roman Numerals  51 to 60

51	52	53	54	55	56	57	58	59	60
LI	LII	LIII	LIV	LV	LVI	LVII	LVIII	LIX	LX

Numberals 61 to 70

61	62	63	64	65	66	67	68	69	70
LXI	LXII	LXIII	LXIV	LXV	LXVI	LXVII	LXVIII	LXIX	LXX

Roman Numerals  71 to 80

71	72	73	74	75	76	77	78	79	80
LXXI	LXXII	LXXIII	LXXIV	LXXV	LXXVI	LXXVII	LXXVIII	LXXIX	LXXX

Roman Numerals   81 to 90

81	82	83	84	85	86	87	88	89	90
LXXXI	LXXXII	LXXXIII	LXXXIV	LXXXV	LXXXVI	LXXXVII	LXXXIII	LXXXIX	XC

Roman Numerals   91 to 100

91	92	93	94	95	96	97	98	99	100
XCI	XCII	XCIII	XCIV	XCV	XCVI	XCVII	XCVIII	XCIX	XC

Question - Why did we stop using Roman numerals?

Answer - the Roman numeral system is inconvenient and long calculation. therefore it has been replaced by the easier Indo-Arabic numeral ( that is 0, 1, 2, 3, 4, 5, .6, 7, 8, 9.).


Write Roman numerals:

1.  VI   =     5  +  1  =  6


2.   IX   =   10  -   1  =  9


3.  XV   =   10 +   5  = 15


4.XVII  =    10 +  7 = 17


5.XLIV =     40 +  4  = 44